What are my options if now, after talking to our insurance, our insurance wants us to pay my $500 deductible but she was the victim?

My wife had just turned left onto a street and traffic was bad so she was just sitting there not moving at all. The lane to her right started to move and a bus made the same turn (both lanes were allowed to turn left). The bus was an articulated bus and when the last half of the bus passed by our car. It scraped against our car damaging it. The bus continued on and did not stop - leaving her behind sitting in traffic with a messed up back bumper. She created a police claim over the phone and also contacted the Metro office and gave them a statement of what happened with a metro supervisor in person. She also took a picture of the bus driving away and provided that information to Metro.